Graphing Libraries

I'm looking into graphing libraries right now and I've been working with Graphviz because some folks here use it. Another language / tool that also got mentioned was GraphML, which is from what I've been told a little more powerful than Graphviz.

Here's a sample of the Graphviz dot language:

graph g {
  A -> B;
}

Guess what, that creates two nodes with circles around them and connects them with a line.

To do that in GraphML:

<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
     http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
  <graph id="G" edgedefault="undirected">
    <node id="a"/>
    <node id="b"/>
 <edge source="a" target="b"/>
  </graph>
</graphml>

heh. ouch.

Their homepage says it all:

Unlike many other file formats for graphs, GraphML does not use a custom syntax. Instead, it is based on XML and hence ideally suited as a common denominator for all kinds of services generating, archiving, or processing graphs.

I guess so, but what's better to optimize for, a service using your graphing language, or the poor schmuck who has to use it? Being more powerful is great, but it looks annoying to type. That's really what I want API / language designers to optimize for. How annoying will it be to type :)